Ejector



A-SSAGS Feb. 12 '1924.

yH UD. 'YQDER EJECTOR Filed July s. 1.922 i www# Patented Feb. 12, 1924.

UNITED STATES PATENT OFFICE.

HOWARD D. YODER, 0F DETROIT, MICHIGAN, ASSIGNOR TO PENBERTHY INJECTOBCOMPANY, OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

EJECTOR.

Application led July 3, 1922.

T0 all, whom it may concern: i

Be it known that I, HOWARD D. YoDEn, a citizen of the United States ofAmerica, re vsiding at Detroit, in the county of IVayne and State ofMichigan, have invented certain new and useful Improvements in Ejectors,of which the following is a specification, reference being had thereinto the accompanying drawings.

The invention relates to ejectors of that type in which water underpressure is utilized for periodically ejecting drainage water from asump or other receptacle. With such constructions it is usual to turn onor of the actuating water head by the operation of a oat which islocated in the sump. Thus the rise of water in thesump, by lifting thefloat, Will open the supply. valve and cause the operation of theejector, While the lowering of the water in. the. sump by dropping thefloat will again close the supply valve and arrest further operation.

One difficulty which has been encountered in the operation of suchmechanisms is the tendency for the fioat to assume a position where thesupply valve is only slightly opened, thus interfering with the properoperation of the ejector and being wasteful of'the wat-er supply. Toavoid this defect, I have provided means for temporarily delaying themovement of the float, both in its rising and falling, so as to secure amore positive action and a complete opening or closing ofthe valve. Tothis end the invention consists in the construction as hereinafter setforth.

In the drawings:

Figure 1 is a vertical central section through the ejecto`r as arrangedin a sump; l Figure 2 is a section on line 2-2 of Figure 1.

A is the sump or other receptacle in which the drainage water collects.B is the discharge conduit which extends centrally down in said sump andis supported by a standard C having a strainer D for protectin@ theinlet and also provided with a foot va ve E for retaining sufficientwater in the conduit B t expedite starting of the ejector. F is theejector connected to the upper end of the conduit B and preferably eX-tcnding laterally therefrom and communicating with an upwardly extendingconduit section G, which leads to the point. of dis,

Serial No. 572,661.

charge. The ejector is provided with the usual Venturi shaped chamber Hand nozzle I which receives water under pressn'e from the supply conduitJ. This supply is, however, controlled by a valve K which is normallyclosed and is only occasionally opened when actionl of the ejector isrequired. L is `the float for controlling action of the ejector, which,asshown, is sleeved upon the vertical conduit B. M is a lever foropening and closing the valve K, being pivotally attached to the stem ofsaid valve and having a fulcrum link N attaching it to the ejectorcasing and a pair of links O for attachment to the float L. The links Opreferably embrace the laterally projecting portion of the ejectorcasing F and are vattached to the float by the pivot P and to the leverM by the The construction as just described is open i to the objection,before referred to, that the float may assume a position where the valveK is only slightly opened, so that the ejector is not efficientlyoperated whiie the water supply is wasted. To avoid this result, Ihavemade a simple attachment shown in detail in Figure 2. This consistsof a pair of' rollers R mounted in dogs S, which are attached to theopposite links O andproject inward therefrom into interference with thecasing F. The dogs S are, however, resil- -ientljT yieldable, beingheldin normal posi tion by the tension of a spring T extending therebetween,.so that when sufficient pres.- sure is exerted by the float in eitheran up ward or downward direction, the rolls R will be forced by thecasingF springing outward the dogs S. As specifically shown, the dogs Shave their inwardly projecting portions carrying the rolls R passingthrough central slots U in the links O, while the lower ends of saiddogs are loosely secured by the headed ends P and P2 ofthe yjectingfianges S at the extreme lower ends of the dogs which formfulcrum lbearings on the links O.

The links O are preferably -arranged to embrace the portion of theejector casing F, which forms the restriction of the Venturi passage,land to give mechanical strength to this portion of .the casing it isprovided with ribs F. These ribs cooperate with the rollers R to place agreater obstruction to the movement of the links than would be the aseif they were engaged with a round conuit.

In the complete operation of the device, when the water rises in thesump, the oat L can only rise to a point where the rollers R engage thecasing F,4 this being insufficient to lift the valve K from its seat. Asthe water continues to rise in the sump, it will eventually createsuflicient upward pressure on the float to overcome the resistance ofthe rollers R, whereupon the spring T will yield, the dogs S movingoutward and the rollers R passing the ribs F. When the resistance isovercome, the float will quickly rise tothe higher level of water in thesump, in which position the valve K will be fully opened and the ejectorset in operation. This will discharge water from the sump, dropping thelevel, but the float is not permitted to immediately drop with thewater, as the rollers R contacting with the ribs F will still hold thefloat in raised position until the increasing weight again overcomes thetension of the spring T. As shown in Figure 2, the links O are formedfrom a single bar return-bent at its upper end, as indicated at O. Also,as shown in Figure l, the pivot Q, which attaches the lever M to thelinks, engages longitudinal slots O2 in said links, permitting a certainamount of lost motion. Thus the float in rising and falling first takesup the lost motion between the links and the lever, after which the dogsS come into action and restrain further movement, functioning in themanner previously fis. accumulated thereon, said means compris- Qing astationary memberanda cooperating Vmember movable with said `float, and'con necting means-between said valve and-'fleat ,forvtransmittin'g theaccumulated pressure on the float to said valve for effecting a fullmovement thereof.

2. The combination with an ejector, of a valve for controlling thesupply of actuating fluid thereto, a float for controlling the openingand closing of said valve, a pair of links for connecting said float tothe valve,

a stationary member between said links and spring-pressed dogs forengaging said stationary member to temporarily arrest movement of saidlinks until pressure is accumulated to overcome the tension of thespring.

3. The combination with an ejector having a suction conduit, a'discharge conduit and a supply conduit for the actuating fluid, a floatsleeved upon the suction conduit, a valve for controlling tl actuatingfluid, a pair of links connected to said float and to said valveembracing a portion of the discharge conduit, and spring-pressed dogs onsaid links projecting inward therefrom into obstructive relation to saiddischarge conuit to delay the rising and falling of the oat.

4. The combination with an ejector casing having a suction conduitdepending from a portion thereof and a discharge conduit rising fromanother portion, a supply conduit for', the actuating fluid connected tosaid ejector, a valve for controlling the fluid supply, a float sleevedupon the suction conduit, a lever for actuating said valve extendingabove the ejector casing, a pair of links pivotally attached at theirlower ends to said float and at their upper ends to saidlever, saidlinks embracing said ejector casing, and spring-pressed dogs engagingsaid links and extending inward therefrom into obstructive relation tosaid ejector casing, whereby the rise and fall of said float is delayed.

5. The combination with an ejector casing having a contracted Venturiportion and external ribs for strengthening the same, a suction conduitfor said ejector, a supply conduit for the actuating Huid, a valve forcontrolling said fluid supply, a float sleeved upon said suctionconduit, a pair of links connected to said float and embracin the ribbedportion of said -ejector casing, aglever for connecting the upper endsof said links to said valve, dogs secured to said links projectinginward therefrom provided with rollers for engaging said ribbed casing,and a spring for yieldably drawing said dogs inward into obstructiverelation to said cas ing, whereby the rise and fall of the float isdelayed.

In testimony whereof I aiiix my signature.

HOWARD D. Yonne.

